---
id: "CVE-2026-125745"
page: "https://infrastack.ai/live/CVE-2026-125745"
kind: "vulnerability"
aliases: ["CVE-2026-125745"]
title: "WCK WordPress plugin: authenticated users can read private post custom fields"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "wck", "wordpress"]
not_affected_if: ["no-wck-meta-boxes", "plugin-updated"]
published_at: "2026-11-10T13:18:23+00:00"
first_seen_at: "2026-11-10T13:22:03+00:00"
updated_at: "2026-11-10T13:23:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125745", "first_seen_at": "2026-11-10T13:22:03+00:00"}]
exploit_sources: []
---

# WCK WordPress plugin: authenticated users can read private post custom fields

Link for people: https://infrastack.ai/live/CVE-2026-125745 (this .md is for agents)

The WCK plugin for WordPress before 2.4.1 has an AJAX handler that skips capability checks, so a logged-in user can read custom-field values on posts they cannot edit. An attacker can read private or draft post data and other users' sensitive post-meta or option values.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed WCK (Custom Post Types and Custom Fields creator) plugin version in the WordPress admin under Plugins.
- Look for the `wck_show_update_form` AJAX action in the plugin code.

## Fix

- Move the WCK plugin to version `2.4.1` or later.

## Timeline

- 2026-11-10T13:22:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125745

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/wck-before-missing-authorization-via-wck-show-update-form-ajax

## From the sources

Custom Post Types and Custom Fields creator (WCK) before 2.4.1 contains a missing authorization vulnerability that allows authenticated attackers with access to any WCK meta box to read custom-field values on posts they cannot edit by exploiting the wck_show_update_form AJAX handler, which lacks the capability checks enforced by other handlers and relies on a shared, non-unique nonce action. Attackers can send a crafted admin-ajax.php request with a valid wck-edit-entry nonce, a target meta key, and an arbitrary post ID to disclose sensitive post-meta or option values belonging to other users, including private or draft post data.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_